Typewriting machine



L. c. MYI-:Rs

TYPEWRITING MACHINE Filed 0G11. 18, 192'? 6 Md r .annulla- Patched `'July-1o,l 192s.

LEWIS C. MYERS, F FREEPORT, NEW YORK, ASSIGIN'OIIRl T0 ROYAL TYPEWRITER, lI'0- y PANY, INC., OF NEW YORK, N'. Y., A CORPORATION-OF NEW YORK.

mnwnrrxne MACHINE.

application mea V0mm is, 1927. semi m. $29,952.

l0 stop for-the movable dog of the escapement` mechanism is set so that ordinarily a double space movement of the carriageoccurs whenever a character is written. `Certainof the keys, however, operate -mechanism which sets Aan auxiliary stop that limits the movement .of the stepping dog to`a single space when suchY keys are depressed. However, the connection by which these 'keys operate the auxiliary stop isbroken when the platen 1s 90 shifted to uppercase position so that all upper case characters have a double space.

The invention -is illustrated as applied to a Ro al standard machine, although it is applica le to machines of other types. Only so much of the machine is illustrated as is necessary to show the construction and operation of the invention. In the drawings: Figure 1 is a fore and aft vertical section a0 with parts in elevation showing the mechanismin normal position.

`Figure .2 is a similar view of part of the mechanism shown in operative position. Figure 3 is a front view of the escapement mechanism. b Figure 4 is a front view of a universal ar. The drawings disclose a portion of the main frame Aa shift frame B which sup ports a shaft C carrying a pinion D with which coacts a rackv E supported in the usual manner on the carriage. The shaft C. also carries an escapement wheel F with which cooperate a rigid dog H and a movable dog K carried by the escapement rocker G. The

type actionl comprises key levers L, each of v the ,arm under the influence of the spring12 l which is connected by a link M to a front link N, the vfree end of which is connected gy a link O to the rear end of a type bar P.

he link O is connected by another link R 'to the usual universal bar S in which the escapement mechanism is operated. As illustrated, these parts are such as are., usually emplo ed'. in the Royal machine, but they may from 'the spirit 4of the invention.

The dog rocker -Gr is provided witha stop 1 which normally limits the movement of the stepping dog to the position ,a shown in dotted lines in Figure 3 and this movement results in a double letter spacing mpvementV the carriage. It is obvious, therefore, that upon depression of any key lever, the escapement is'actuated in the usual manner and a double letter 'space movement of the `carriage will take place unless this is prevented in some manner. v p A lever 2 is pivoted at 3 to a bracket carried .by the shift frame B, and this lever has an oliset end 4 most clearly shown`in Figwidely yvaried without departing of the escapement wheeland consequently of ure 3.. When thislever is moved, the offset i end comes into the path of the movable dog` K and limits its stepping movement to the dotted linel position b shown in Figure 3 Ywhich permits only a single letter space movement of the escapement wheel and the carriage. spring 5 which is connected at oneend to an'ear 6 of the lever; 2 and' at its other end to a fixed part 7 normally holds the lever 2 in the Figure lposition. rlhe lever 2 is moved from. the Figure 1 to the Figure 2 position in -the following forked and engages over `a pin 8fcarried by an arm 9 which is pivoted at 10 to a bracket 11 supported by the frame of the machine.

The lowerend of this/lever 2 is This arm is normally held in the Figure 1 i position by means of a spring 12 which is connected at one end to the arm 9 and 'at the otherv end to an ear 13 on the bracket 11. A bent over ear 14 ofthe 'arm 9 contacts with the bracket 11 tolimit the movement of and an arm or extension coacts with the the bar or producing any movement thereof.

- the universal bar.

llt also has a portion 22 with Which certain key levers will contact when operated and by such contact will impart movement to Since there are four rows of key levers which extend dierent distances in front of said universal bar, the contacting portions 22 are arranged at four dierent elevations as indicated at c, d, e and f. This resultsI in a movement of uniform extent being given the universal bar 20 no matterwhich row of key levers may operate'` the same. The space bar 1s supported by levers which contact with the outer proJections 23 of the universal bar 20 so that an operation of the space bar' when the platen is in lower case position will give a single space movement of the carriage but a double space movement when the platen is in upper case position. i

When the parts are in the position shown in Figure 1 .and the platen is in' lower case position, the depression of any key lever which operates the universal bar 20 will move the stop 4 into operative position as shown in Figure 2 and thus limits the movement of the carriage to a single letter space movement. `When the carriage and platen are shifted to upper caseposition, the lever 2 lwhich is carried by the shift frame will move upward into the dotted line position of llgure 1 and the fork will move out of engagement with the pin 8. When in this position the actuation of any'key lever will produce a double space movement of the carriage since even if the universal bar 20 isoperated the resultant movement of the arm 9 will be an idle movement producing no effect on the lever 2.

lt will be apparent that any desired characters may be given a single space by proper selection of the engaging portions 22 of the universal bar 20. It is also obvious that the change produced by the case shift movement of the carriage is entirely automatic and requires no attention on the part of the operator. "llhe construction by which the result is obtained is very simple and efficient and the mechanism can be embodied in the usual machine Without the necessity of making any change in the. construction of the regu lar machine. lt is only necessary that the stop 1 shall be normally set to allow the step Leraars ping dog a double space movement. Various features may be modified without in any way departing from the spirit of the invention which is to be regarded as limited only by the scope of the appended claims.

l claim as my invention:

1. i ln a typewriting'machine having a shift frame and an escapement mechanism including a stepping dog; a stop permitting normal double space movement of said dog, an auxiliary stop, and means for moving said auxiliary stop into position to .limit said do to a single space movement, said means inc uding connections which are disabled when the shift frame is moved to upper case position.

2. ln a typewriting machine having key levers, a shift frame, and an escapement mechanism including a stepping dog; a stop permitting normal double space movement of said dog, anauxiliary stop, and means operated by certain of said key levers`for moving said auxiliary stop into position to limit said dog to a single space movement, said means including connections which are disabled when the shift frame is moved to upper case position.

3. ln a typewriting machine having keyv levers, a shift frame, and an escapement 'mechanism including a stepping dog; a stop permitting normal double space movement of said dog, an auxiliary stop, and means Y operated by certain of said key levers for moving said auxiliary stop into position to limit said dog to a single space movement, said means including connections which are separated when the shift frame is moved to upper case position.

4:. lln a typewriting machine having a main frame, shift frame, key levers, and an escapement mechanism including a stepping dog; a stop permitting normal double space movement of said dog, an auxiliary stop carried by the shift frame, and means operated by certain of said key levers for moving the auxiliary stop into position to limit the dog to a single space movement.

5. lln a typewriting machine having a main frame, shift frame, key levers, and an escapement mechanism including a stepping dog; a stop permit-ting normal double space movement of said dog, an auxiliary stop carlill@ llllll llllll ried by the shift frame, and means operated. 1

6. ln a typewriting machine having a main frame, shift frame, key levers and an escapement mechanism including a stepping dog; a stop permitting normal double space movement of said dog, a lever pivot/ed on the shift frame, an auxiliary stop carried by said lever and movable into position to limit said dog to a single space movement, and means operated by certain `of said key levers and operatively 'engaged with said lever.

7. In a typewriting machine having a main frame, shift frame, key levers and. an eseapement mechanism including a stepping dog; a stop permitting normal double space movement of said dog, a lever pivoted 0n 10 the shift frame, an auxiliary stop carried by said lever and movable into position to limit said dog to a single space movement, and means operated by certain of said key levers and operatively engaged with said lever, said means including an arm having 15 a separable connection with said lever, which connection is broken when the shift frame` is moved to upper case position.

In testimony whereof, I have hereunto subscribed my name.

LEWIS C. MYERS. 

